还是一样的分为UI闪烁和物体闪烁，其中具体可分为：UI闪烁、物体闪烁与半透明闪烁
1，UI闪烁
对于UI 还是一样的，改写UI本身的shader：
Shader "UI/YydUIShanShder"
{
Properties
{
[PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {}
_Color("Tint", Color) = (1,1,1,1)
_StencilComp("Stencil Comparison", Float) = 8
_Stencil("Stencil ID", Float) = 0
_StencilOp("Stencil Operation", Float) = 0
_StencilWriteMask("Stencil Write Mask", Float) = 255
_StencilReadMask("Stencil Read Mask", Float) = 255
_ColorMask("Color Mask", Float) = 15
[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip("Use Alpha Clip", Float) = 0
[Toggle]_Switch("Switch", Float) = 0
_value("Speed",Range(1,3)) = 1
_overlayCol("OtherColor",Color) = (0.2146,1,0,0.6039)
}
SubShader
{
Tags
{
"Queue" = "Transparent"
"IgnoreProjector" = "True"
"RenderType" = "Transparent"
"PreviewType" = "Plane"
"CanUseSpriteAtlas" = "True"
}
Stencil
{
Ref[_Stencil]
Comp[_StencilComp]
Pass[_StencilOp]
ReadMask[_StencilReadMask]
WriteMask[_StencilWriteMask]
}
Cull Off
Lighting Off
ZWrite Off
ZTest[unity_GUIZTestMode]
Blend SrcAlpha OneMinusSrcAlpha
ColorMask[_ColorMask]
Pass
{
Name "Default"
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 2.0
#include "UnityCG.cginc"
#include "UnityUI.cginc"
#pragma multi_compile_local _ UNITY_UI_CLIP_RECT
#pragma multi_compile_local _ UNITY_UI_ALPHACLIP
struct appdata_t
{
float4 vertex : POSITION;
float4 color : COLOR;
float2 texcoord : TEXCOORD0;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
struct v2f
{
float4 vertex : SV_POSITION;
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
float4 worldPosition : TEXCOORD1;
half4 mask : TEXCOORD2;
UNITY_VERTEX_OUTPUT_STEREO
};
sampler2D _MainTex;
fixed4 _Color;
fixed4 _TextureSampleAdd;
float4 _ClipRect;
float4 _MainTex_ST;
float _UIMaskSoftnessX;
float _UIMaskSoftnessY;
float _value;
float4 _overlayCol;
half _Switch;
v2f vert(appdata_t v)
{
v2f OUT;
UNITY_SETUP_INSTANCE_ID(v);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
float4 vPosition = UnityObjectToClipPos(v.vertex);
OUT.worldPosition = v.vertex;
OUT.vertex = vPosition;
float2 pixelSize = vPosition.w;
pixelSize /= float2(1, 1) * abs(mul((float2x2)UNITY_MATRIX_P, _ScreenParams.xy));
float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
float2 maskUV = (v.vertex.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);
OUT.texcoord = TRANSFORM_TEX(v.texcoord.xy, _MainTex);
OUT.mask = half4(v.vertex.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_UIMaskSoftnessX, _UIMaskSoftnessY) + abs(pixelSize.xy)));
OUT.color = v.color * _Color;
return OUT;
}
fixed4 frag(v2f IN) : SV_Target
{
half4 color = IN.color * (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd);
#ifdef UNITY_UI_CLIP_RECT
half2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(IN.mask.xy)) * IN.mask.zw);
color.a *= m.x * m.y;
#endif
#ifdef UNITY_UI_ALPHACLIP
clip(color.a - 0.001);
#endif
half _g = dot(color.rgb, unity_ColorSpaceLuminance);
//这部分是自定义处理的
if (_Switch == 1)
{
fixed4 col = _overlayCol;
float t = abs(sin(_Time.w * _value));
col.a = lerp(0, _overlayCol.a, t);
color = lerp(color, col, col.a);//将col叠加在color上
}
return color;
}
ENDCG
}
}
}实现原理我们可以理解为，在原有的图片上，叠加了一层会随着时间变化而变化透明度的纯色。
和原image的shader相比，基本没做太大改动。只是为了实现闪烁效果，自定义了如下部分：
//这部分是自定义处理的
if (_Switch == 1)
{
fixed4 col = _overlayCol;
float t = abs(sin(_Time.w * _value));
col.a = lerp(0, _overlayCol.a, t);
color = lerp(color, col, col.a);//将col叠加在color上
}2，物体闪烁
原理相同，实现代码如下：
Shader "YaDong/YydShanShader"
{
Properties
{
_MainTex("Texture", 2D) = "white" {}
[Header(twinkle)]
_twinkleCol("闪光色",Color) = (0.7735,0.7735,0.7735,1)
_twinkleValue("闪烁 Speed",float) = 1
_middleValue("中间值",float) = 0.5
_volatilityValue("波动",float) = 0.6
}
SubShader
{
Tags { "RenderType" = "Opaque" }
LOD 100
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
//#pragma multi_compile_fog
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float2 uv : TEXCOORD0;
//UNITY_FOG_COORDS(1)
float4 vertex : SV_POSITION;
};
sampler2D _MainTex, _YydChangeInterval;
float4 _MainTex_ST;
float4 _twinkleCol;
float _twinkleValue;
float _middleValue;
float _volatilityValue;
v2f vert(appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
// UNITY_TRANSFER_FOG(o,o.vertex);
return o;
}
fixed4 frag(v2f i) : SV_Target
{
// sample the texture
fixed4 col = tex2D(_MainTex, i.uv);
float t = abs(sin(_Time.w * _twinkleValue)* _volatilityValue)+ _middleValue;// +0.5;
col.rgb = lerp(col.rgb, saturate(col.rgb + _twinkleCol.rgb), t);
return col;
}
ENDCG
}
}
}
3，纯色半透明闪烁
文章来源：https://www.toymoban.com/news/detail-736129.html
与上述物体闪烁不同的是，这个只是在颜色基础上加了半透明闪烁，实现代码如下：文章来源地址https://www.toymoban.com/news/detail-736129.html
Shader "YaDong/YydGreenShader"
{
Properties
{
_MainTex("Texture", 2D) = "white" {}
_value("速度",Range(1,3)) = 1
_overlayCol("叠加色",Color) = (0.2146,1,0,0.6039)
}
SubShader
{
//Tags { "RenderType" = "Opaque" }
Tags { "Queue" = "Transparent" "RenderType" = "Transparent" }
zWrite off
blend srcAlpha one
//LOD 100
Pass
{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
//#pragma multi_compile_fog
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float2 uv : TEXCOORD0;
//UNITY_FOG_COORDS(1)
float4 vertex : SV_POSITION;
};
sampler2D _MainTex, _YydChangeInterval;
float4 _MainTex_ST;
float _value;
float4 _overlayCol;
v2f vert(appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
// UNITY_TRANSFER_FOG(o,o.vertex);
return o;
}
fixed4 frag(v2f i) : SV_Target
{
fixed4 col = _overlayCol;
float t = abs(sin(_Time.w * _value));
col.a = lerp(0.3, _overlayCol.a, t);
return col;
}
ENDCG
}
}
}
到了这里，关于Unity Shader:闪烁的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！
